Finally, the UGT1A1*27, also associated with the Gilbert Syndrome, has a complete linkage with the 1A4 intronic SNP c.867+101G>T (1A4*1d) (D’  =  1, R2  =  1) (Fig. 1B), suggesting that, in addition to 1A1*27, the 1A4*1d can be used as a genotyping marker for the Gilbert Syndrome. The gene discussed is UGT1A1; the disease is Gilbert syndrome.